15G 'niE JOURNAL OF BOTANY 



forms ; e. g.l2 under CfPsium Fr. One would have expected that 

 in Sweden there would have been many of the 52 forms described by 

 Norrlin m Herb. Mus. Fennici (1889) pp. 146-153, but only three 

 are given for both. Surely the climatal conditions in Finland, 

 especiall}^ south of 68° N. lat., must be similar in the adjoining part 

 of Sweden ? and does not this go far to show these are local forms 

 induced b}" local conditions ? Again, out of 168 species of Hieracia 

 named as occurring in Finland, 46 are found in one province each 

 only, ranging in latitude from 60° to 69°. 



With regard to the statistics of the Scandinavian Flora my friend 

 Dr. Nordstedt of Lund tells me that the only work which approaches 

 Berlin's in usefulness is Enumeratio Plant cb SuecicB, Norvegia, 

 Fennics et Danice by H. Hamberg, published at Stockholm in 1897. 



Keys to all genera with more than three species as well as to the 

 species themselves, combined with clear printing and general arrange- 

 ment make Dr. Lindman's book a desirable acquisition ; but one has 

 a lingering regret that the style of Hartmann's Flora was not 

 adopted. 



Arthur Bennett. 



American Honey Plants together witli those toliich are of special 

 value to the Beekeeper as soui-ces of Pollen. By Frank C. 

 Pel LETT. 8vo, cloth, pp. 297, 155 illustrations. American 

 B^e Journal, Hamilton, Illinois. Price $2 "50. 



This, which is announced "as the first book in the English 

 language on the subject of the Hone}^ Plants," is the result of many 

 years of study and personal visits to important honey-producing dis- 

 tricts, from New England to California and from Canada to Florida 

 and Texas. It is in every way an attractive volume, and is the 

 work of one who is not only thoroughly conversant with his special 

 subject of bee-keeping — as to which he is indeed a recognized 

 authority — but with the plants from which the objects of his study 

 derive their material. 



The title gives a somewhat inadequate notion of the contents of 

 the book. The plants of course form its leading feature, and there 

 are special articles devoted to the " honey-flora " of the principal 

 States, in which the more prominent constituents are enumerated, 

 with notes as to the times of flowering, the predominance and succes- 

 sion of ]mrticular species and their relative importance. The species 

 are not described, being for the most part familiar and of common 

 occurrence, but excellent figures are given of more than 150. The 

 subject of nectar, its physiology and secretion, is treated in two long 

 articles, in the course of which the researches of Sprengel (the title- 

 page of whose book is reproduced), Darwin, Delpino, and Miiller are 

 admirably summarised by Professor Trelease. The contents are all 

 arranged under one alphabet ; the plants are entered under the names 

 by which they are most widely known, the Latin and other names 

 appearing as cross-references. In the larger genera, such as SolidagOy 

 Aster, and Salvia, the chief honey-yielding species are discriminated ; 

 the question as to whether the honejdoee is able to secure honey from 



